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How to Install, Delete, Update packages in RedHat/Fedora/CentOS

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Introduction

RPM (Red Hat Package Manager) is an open source package management utility for RHEL, CentOS and Fedora based systems and is used for following purposes:

  • Install
  • Delete
  • Update
  • Query
  • List
  • Verify

Syntax

RPM filename contains four parts Package Name, Version, Release & Architecture Name

vsftpd-2.2.2-14.el6.i686.rpm

Package Name – vsftpd
Version – 2.2.2-14
Release – el6
Architecture – i686

1) Install an RPM Package

To install an RPM Package on linux machine use the following command.

# rpm -ivh vsftpd-2.2.2-14.el6.i686.rpm

Preparing... ########################################### [100%]
1:vsftpd ########################################### [100%]

where
-i : install
-v : verbose
-h: print hash marks

2) Delete an RPM Package

To remove a package use -e option in order to delete an RPM package.

# rpm -e vsftpd

3) Update an RPM Package

Use -U option to update/upgrade an RPM package.

# rpm -Uvh vsftpd-2.2.2-14.el6.i686.rpm
Preparing... ########################################### [100%]
1:vsftpd ########################################### [100%]

4) Query an RPM Package

To query specific package use -qa option

# rpm -qa|grep vsftpd
vsftpd-2.2.2-14.el6.i686

-q : Query a package

5) List an RPM Package

To view the package list use -ql option

# rpm -ql vsftpd-2.2.2-14.el6.i686.rpm

6) Verify an RPM Package

In order to verify RPM package use the following command

# rpm -Va

Note: There is another easiest method to install,delete,update packages in RedHat/Fedora/CentOS based machine through YUM commands.

How to Install & Configure VIM Editor in Linux

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Step 1: Install VIM Package

Firstly, install the vim package:
For RedHat/Fedora/CentOS

# yum -y install vim vim-enhanced

For Debian/Ubuntu

# apt-get install vim

Step 2: Set the aliase

Set the aliase of vim command in /etc/profile file

# vi /etc/profile
alias vi='vim'

Step 3:Configure Vim

Edit following changes in ~/.vimrc in order to configure VIM Editor

# vi ~/.vimrc

" use extended function of vim (no compatible with vi)

set nocompatible
" specify encoding

set encoding=euc-jp
" specify file encoding

set fileencodings=iso-2022-jp,sjis
" specify file formats

set fileformats=unix,dos
" take backup

" if not, specify [ set nobackup ]

set backup
" specify backup directory

set backupdir=~/backup
" take 50 search histories

set history=50
" ignore Case

set ignorecase
" distinct Capital if you mix it in search words

set smartcase
" highlights matched words

" if not, specify [ set nohlsearch ]

set hlsearch
" use incremental search

" if not, specify [ set noincsearch ]

set incsearch
" show line number

" if not, specify [ set nonumber ]

set number
" Visualize break ( $ ) or tab ( ^I )

set list
" highlights parentheses

set showmatch
" show color display

" if not, specify [ syntax off ]

syntax on
" change colors for comments if it's set [ syntax on ]

highlight Comment ctermfg=LightCyan
" wrap lines

" if not, specify [ set nowrap ]

set wrap